amiableness

The quality of being amiable; amiableness; sweetness of disposition.

His character has always been greatly extolled for the judgment which he exhibited in very trying periods, and for the amiableness of his disposition. 

No one can be more sensible than I am of the esteem of Charles Feilding, nor more disposed to do justice to the amiableness of his character.

All history gives us proof that the degree of virtue and amiableness in women is in proportion to the freedom they enjoy or the degree in which they can move and act independently and uncontrolled.

In her personal appearance Elizabeth was stately and majestic, but by no means remarkable for her beauty, or amiableness of temper.